75436747040639 has 2 divisors, whose sum is σ = 75436747040640. Its totient is φ = 75436747040638.

The previous prime is 75436747040621. The next prime is 75436747040723. The reversal of 75436747040639 is 93604074763457.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (93604074763457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75436747040639 - 2¹⁶ = 75436746975103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75436747042639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37718373520319 + 37718373520320.

It is an arithmetic number, because the mean of its divisors is an integer number (37718373520320).

Almost surely, 2^{75436747040639} is an apocalyptic number.

75436747040639 is a deficient number, since it is larger than the sum of its proper divisors (1).

75436747040639 is an equidigital number, since it uses as much as digits as its factorization.

75436747040639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320060160, while the sum is 65.

The spelling of 75436747040639 in words is "seventy-five trillion, four hundred thirty-six billion, seven hundred forty-seven million, forty thousand, six hundred thirty-nine".